Grinding and polishing machine.



LPATBNTED JULY 19, 1904. W. v. ROBINSON. I GRINDING AND POLISHINGMACHINE.

APPLICATION FILED SEPT. 15. 1903.

m a. w 5. 1 2? M? W v wi m Q m UNITED STATES Patented July 19, 1904.

PATENT OFFICE.

GRINDING AND POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 765,199, dated July 19,1904.

Application filed September 15, 1903. Serial No. 173,255. (No model.)

1'0 all whom it may concern:

Be it known that I, WVILLIAM V. ROBINSON, a subject of the King of GreatBritain, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements in Grindingand Polishing Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

It is the special object of the invention to provide a construction ofautomatic grinding and polishing machine adapted for operating uponannular or circular pieces of work in which the surface to be ground hasa double curvature.

It is a further object to provide means whereby the work when onceplaced in the machine will be carried successively into 0perativerelation to grinders or polishers of different grades, so that thecomplete operation from the rough grinding to the highest polishing isperformed during the passage of the work through the machine.

The invention consists in the construction of a rotary Work holder;further, in the means for feeding said holders successively to thegrinders, and, further, in the peculiar construction, arrangement, andcombination of parts, as hereinafter set forth.

In the drawings, Figure 1 is a diagrammatic elevation of the machine.Fig. 2 is a perspective view of one of the work-holders in operativerelation to a grinder. Fig. 3 is a longitudinal section therethrough.

A is a suitable frame having arranged longitudinally thereof the guidesB, with which the work-holders O are detachably engaged. Each of thesework-holders comprise a frame (0, having lugs or feet Z) for engagingwith the guides B on the bed. I

c is a second frame, which is pivotally secured at one end to the framea and is adjustably held in an inclined position in relation to theframe A. As sh0wn,the adjustable support is formed by segmental braces(Z and (Z, projecting upward and downward, respectively, from the framesa and 0. These braces are slotted longitudinally, and the clamping- .larpieces of work, such as stove-rings.

screw c,passing through said slots, is arranged to lock them in anyposition of adjustment.

Upon the frame C is journalcd a rotary Work-holder D, the aXis of whichis perpendicular to the plane of the frame 0, and consequently isinclined to the plane of the frame a and of the bed. In the constructionshown the holder D is adapted for supporting annu- For this purpose itis of substantially disk-shaped form, having its edges rounded to form aseat for the rounded rings and being provided with clamps f for lockingthe work thereon.

E is a spindle secured to the holder D and journaled in a bearing F.This bearing is connected to a cross-head (it, which is adjustablysecured in the frame 0, preferably by forming the grooved guides g onsaid frame. The cross-head G is locked in the frame in differentpositions of adjustment by suitable clamping means, such as the screws71 H is a beveled gear-wheel secured to the spindle E, and I is anintermeshing beveled gear-wheel upon the shaft J, journaled in thebearing K, also upon the cross-head G. The shaft J extends to the sideof the frame O and has secured to its outer end the sprocket M. Thissprocket is adapted to engage with the chain N, extending longitudinallyof the bed and driven to impart a rotary motion to the sprocket duringthe longitudinal movement of the frame C along the bed.

The frames O are engaged with the guides B on the bed and are fed to theopposite end by a suitable feed mechanism, such as the sprocket-chain O,having lugs or dogs P thereon for engaging the cross-bar a of the framea.

Q represents grinder-wheels in horizontally-- adjustable bearings R,yieldably supported by a suitable spring R above the bed A. Thesegrinder-wheels are so positioned as to be centrally above the work as itis fed on the holders D longitudinally of the bed. The edge of thegrinder is rounded, as shown in Fig. 3, and in normal position isslightly lower than the upper edge of the work supportedv on the holderD. Thus as the holders are moved past the grinders the grinder-wheelswill form supporting seats for the work.

0 are then adjusted in inclination by movingthe brace members d and (Zin relation to each other, and the cross-head (i is also adjusted in theguide-bearings g on the frame. The adjustments made are such as toarrange the curved cross-section of the work as nearly as possible tothe plane of travelthat is, to a horizontal plane. When the frame C isadjusted to receive a particular holder D for work of a definite sizeand shape, it may be permitted to remain in this adjustment and to beused successively for carrying any number of hold ers of that size andshape. Inasmuch as the holders D are attached or detached from the frameC merely by engaging or disengaging the spindles E with the bearings F,it is evident that holders bearing finished work may be quickly replacedby others having work to be ground. After the adjustment of the framesthey may be successively engaged with the guides B on the bed, so thatin the rotation of the chain 0 the dogs P will engage with the framesand feed them longitudinally of the bed. In this movement the edge ofthe central upper portion of the work will first be brought into contactwith the rounded edge of the grinder, and at the same time the holder Dis rotated by the action of the chain N, engaging with the sprocket Mand communicating motion through the shaft J and beveled gear-wheels Iand H to the holder D. This will cause the grinding of the workcompletely around the ring during the longitudinal movement of theholder past the grinder. Inasmuch as the grinders Q are supported invertically-yielding bearings, said grinders will mount up the curvedsurface of the work and will remain in contact with the surface untilthe opposite edge is reached. The work is thus successively presented tothe various grinders until after passing the last one of the series itis as highly finished as desired. When the holder reaches the end of thebed,

the frame is removed, the holderdetached therefrom and replaced byanother with an unground piece of work, and the frame is then reengagedwith the bed at the opposite end thereof.

What I claim as my invention is 1. In a grinding-machine, thecombination with a grinder of a longitudinally-traveling work-carrierarranged to pass in adjacence to said grinder, and a rotary work-holderon said carrier having its axis of rotation inclined to the plane oftravel of said carrier. and adapted in the movement of the latter tofeed the work in rotating contact with said grinder.

2. In a grinding-machine, the combination with a vertically-yieldinggrinder, of a workcarrier having its path of travel beneath saidgrinder, a work-holder revolubly mounted on said carrier, with its axisof rotation inclined to the path of movement of the carrier, andsupporting the work in the path of said grinder, and means forsimultaneously feeding said carrier and rotating said holder.

3. In a grinding-machine, the combination with a vertically-yieldinggrinder, of a Workcarrier having its path of movement beneath saidgrinder, arotary Work-holder carried by said carrier, and having itsaxis inclined to the path of movement and means for adjusting saidholder upon said carrier to arrange the upper portion of the rotarycarrier in the path of said grinder.

4. In a grinding-machine, the combination with a grinder of awork-carrier comprising a base portion, and a portion hinged to saidbase portion, and adjustable in angular relation thereto, and a rotarywork-holder journaled on said upper portion with its axis inclined tothe path of movement of said carrier, and means for adjusting the heightof the workholder.

5. In a grinding-machine, the combination with a bed and a grinder abovethe same, of a work-carrier comprising the frame O adapted to travellongitudinally over said bed, the frame a hinged thereto, means foradjustably securing said hinged frame in angular relation to the mainframe of said carrier, a rotary work-holder, and a cross-head in whichsaid holder is journaled adjustably secured in said hinge-frame, wherebythe height and inclination of said rotary holder may be adjusted.

6. In a grinding-machine, the combination with a grinder, of awork-support, comprising a base portion, a hinged member secured to saidbase portion, and adjustable in angular relation thereto, a bearingadjustably secured to said hinged member, and a rotatable spindledetachably mounted within a socketed portion of said bearing.

7 In a grinding-machine, the combination with a bed and grinder adjacentthe same, of a work-carrier comprising a base portion,outwardly-extending arms hinged thereto at its respective ends, anadjustable connection between the upper portion of said arms and saidbase, and a work-holder secured intermediate said arms.

8. In a grinding-machine, the combination with a bed and grinderadjacent the same, of a work-carrier comprising a base portion,upwardly-extending arms hinged thereto at its IO work-holders rotatablymounted upon said carrier, and having their axis inclined to the path ofmovement, and means for independently adjusting said holders upon saidcarrier.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM V. ROBINSON.

Witnesses:

J AS. P. BARRY, H. 0. SMITH;

